Crushing and grinding machine



May 3,1927'. A

' A. C. HAMEY CRUSHING AND GRINDING MACHINE 2 -Sheets-Sheet 1 May 3 1927.

A. C. HAMEYV GRUSHING AND GRINDING MACHINE Filed Pb. l5. 1926 "lull-x 2 Sheets-Sheet 2 Patented p May 3, 1927.

UNITED STATES PATENT GFFICE..

CRUSHING AND-GRINDIN G MACHINE.

Application led February 13, 1926, Serial No. 88,028, and in Australia February 19, 1925.

This invention relates to improvements in crushing and grinding machines, and has for its main object the construction of a machine suitable for either dry or wet grinding, whereby ore, tailings, or othery material widely varying in size may be crushed and ground to any desired degree of fineness.

The invention comprises a-base provided with a crushing and grinding plate,iover which a muller is .revolvable, said muller having a working surfaceopl'uositely shaped to that of the grinding plate. This muller. is carried by an upwardly extend-ing hollow shaft or tube, through which the material to be treated is fed between the muller and said plate. The hollow shaft or tube is revolvable in suitable bearings, and is driven by a drum` or gearing secured to said shaft by vertical keys and keyways, Two or more brackets are positioned equidistantlyto one another at the upper part ofthe tube, to which brackets are pivotally attached governor arms ending in suitable weights, which are adjustable on said arms to suit requirements. v The inner ends of the governor arms terminate in toothed quadrants adapted to mesh with a correspondingly formed collar or cap providedon the upper end of the tube. A cam or the like postionedat the Side of the tube is adapted t0 impart a' vertical reciprocating movement to the tube and muller for` more effectively crushing and grinding the material against the plate. l

For dry treatment, air under pressure, may be forced into a chamber above and around the muller and plate, the air and pulverized material being discharged through a suitable outlet or outlets.

For wet treatment, vwater is preferably forced' through a central passage in the grinding plate, the outlet passage being divided or protected by a suitable cap.

I will now describe my invention with reference to the accompanying drawings, in

* which i Figure 1, is a part sectional elevation of the complete machine, the automatic feed and muller being in the raised position, and Figure 2, 1s a plan view on line 2 2, F1gure 1, with the governor arms partly re-V an enlarged scale, of the cam and slide for raising the muller, and

Figure 5, is a sectional view on line 5 5,

*,10?, either integral with orl in theV form of a separate circumferential ring. `11 is the muller with oppositely formed ridge 11A, and groove 11B. This muller is secured to the hollow shaft or tube ,12, provided with keys 13 Vwhich lconnect it to the, .drum 22, revolving in bearings 14` and 15. Brackets 16 and 17` are secured to the tube ,12, to which brackets the governor arms 18 and 19 are pivoted at20 and 21 respectively. These arms 18 and 19 have adjustably positioned balls 23 23 secured thereon,in order to obtain a varied pressurefor the treatment of different materials. The inner ends of these arms are provided with toothed quadrants 24 and 25, adapted to mesh with a grooved collar or cap 26 secured to the hollow shaft or tube 12. A ring 27 is provided to limit the'downward movement lof said tube in order to control the distance between the muller andthe plate to obtain'the degree of fineness in grinding. The drum 22 is received by the bevel pinion 28, meshing with vthe Abevel wheel 29 secured to said drum,

which bevel .pinion is driven by the beltV pulley 30 on the shaft `31.

The reciprocating movement of the muller 11 and tube-12-is'e1fected by the slide 32 coming into contact with the cam face 33, both the slide and cam being provided with wearing surfaces 34 and 35 respectively. This slide 32 is operated by the member 86 being moved by the cam 37 revolved by the gear wheel 38, which is in turn driven by the gear wheels 39, 40 and 41.

The material is fed automatically and intermittently to the machineby means of a hopper 42 and an archimedian worm conveyor 43, driven by the pulley 44, which conveyor delivers the material into the funnel 45 attached 4to the upper end of the tube 12. An extension end 46 is pivoted at 47 to the end ot the conveyor 43, which end is raised and lowered by the lever 48 provided with a roller 4Q adapted to revolve on the cap or collar 2G, in order that when the muller and tube are in the lowered position, the conveyor 43 will deliver material into this extension end so that no material will be tted to the machine while it is grinding. lVhen the muller ll is in the raised position, a further quantity et material will be delivered by the conveyor 43 as well as the material that has accumulated in the extension end 46 while it is in the lowered position.

The muller 1l is provided Vwith leyways 5() into which keys 5l secured to a drag ring 52 are adapted to take, in order that said ring may be turned by the muller 11. This ring is preferably in two or more sections, suitably joined as at 53, vhe lower edge of each section being pro vided with V-shaped slots or openings 54 in order thata greater degree ot' tineness may be obtained in grinding. A spring or springs may be provided to increase the grinding effect of the drag ring.

In wet treatment water or a suitable solution isV ted to the machine with the material.

In dry treatment, I provide a blower 57 which delivers air under pressure, through the air pipe 58 to the upper side ot the muller ll. This air helps to keepthe muller cool as well as a means ot discharging the finely ground material.

59 is a partition forming a closed-in chamber in which the crushing and grinding operation is carried out, the ground material being discharged into the pipe G0 through the wide mouthed portion (3l.

In operation, material to be crushed and ground, is deposited into the hopper 42, and is ted by the worm conveyor 43 to the fun- Y nel 45, trom whence it is deposited on to thc fall crushing and grinding plate 10 by the hollow shaft or lube l2. rEhe muller ll. is then revolved, the crushing Ytorce being obtained by the slide being forced'inwardly by the cam 3T, which slide contacts with the cam on the tube l2 and thereby raised said tube and muller. As soon as the cam `33 has passed over the slide V32, the tube and muller descend which action crushes the material on the plate The grinding prestorce thereby exerting a downward pressure on the tube l2 which causes the muller to grind the material betweenV it and the plate l0. As the muller 1l revolves, it also turns the drag` ring 52, the slots or openings 54 therein bringing the ground material to a very line state of sub-division. The ground material is then discharged through the wide mouthed portion 6l and through pipe 60 and led to a suitable place for a storage or further treatment.

I claim.

1. In crushing and grinding machines, the combination with a base, and a rotatable and vertically reciprocable muller, ot a plate supported on the base, said plate being conical centrally and provided with a circumferential groove or grooves, the working tace ot the muller having a correspondingly opposite ridge or ridges to said groove or grooves substantially as described.

2. In crushing andl grinding machines as claimed in claim l, the combination therewith ot a hollow shatt, a grooved collar on said shaft, quadrants in engagement therewith and carried by pivotally mounted governor arms, to impart pressure to the muller, substantially as described.

In crushing and grinding machines as claimed in claim l, the combination therewith ot a drag ring provided with slots or openings in the form of saw teeth, tor tine grinding substantially as described.

4. In crushing and grinding machines as claimed in claim l, the combination therewith of a conveyor, a pivoted extension portion thereon and means actuated on the reciprocation of a hollow shaitt to raise and lower said extension portion to deliver intermittently the material to the machine substantially as described.

In crushing and grinding machines as claimed in claim l., the con'iliination therewith ot a drag ring provided with slots in the form oi' saw teeth and means 'or teeding air umler'pressure to the grinding chamber substantially as described.

In testimony whereof l have hereunto set my hand.

.iftltltrc CAMPBELL lliviMllY. 

